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2 asneetzs-Shee't;` 1.

Eg. GILLET. STEAM BOILER.

y(No Model.)

No. 426,536'. Pate'ted Apr. 29, 1890.

INVENTUH WITN ESSES:

v 2 Sheets-Sheet 2. E. GILLET. `STEAM BOILER.

(No Model.)

No. 426,536. PatentedApmQ, 1890.

INVENTOHv ff j ATT NEY H WITNESSES g loan/' UNITED vSTATESl PATENTl OFFICE.

ETIENNE GILLET, OF NEW YORK, Y., ASSIGNOR TOM-ELIZABETH ALINE `GIIJLEI,OF SAME PLACE.

STEAM-BCILE-R.'

SPECIFICATION forming part of Letters Patent N o. 426,586, dated April 29, 1890. Application led January 9, 1889. Serial No. 295,817. (No model.)

.To all whom, t may concern.-

Ile it known that I, ETIENNE GILLET, a citizen of the United States, residing in the city of New York, have invented certain new and useful Improvements in Steam Boilers, of which the following is a specilication.

My invention relates to stealn-boilers of the class disclosed in my application, Serial No. 295,816, tiled simultaneously,herewithtl1at is, the water and steam are confined in a space or passage of small cross-sectional area, where spheroidal formations of Water and steam are prevented, the purpose of such a construction andV operation beingmenerat steam rior and exterior quickly and avoid any danger of explosion.

The general operation and principles upon which my improvements are based are set forth in said application.

The special purpose of my present invention is to provide small boilers light and cheap for small motors of all kinds.

' I form the small steam or Water space desired by lling larger spaces with metal shot 01' pieces of metal 0r other material, and I also employ heat-conducting plates to convey the heat of combustion directly into the mass of finely-divided metal.

In theaceompanying drawings, Figure l is a vertical longitudinal view, with the entire shell in section, of a boiler constructed of a coiled tube filled with shot or finely-com minuted material, the tube being partly broken away to expose the lling. Fig. 2 is a crossseetion of the same. Fig. 3 is a crosssection of the form of tube or pipe shown in Fig. l; Fig. 4, a cross-section of another form of tube; Fig. 5, a vertical section of a boiler composed of vertical tubular sections formed with inteprojecting heat-conducting plates; Fig. (i, a cross-sectional View of same; Fig. 7, a vertical longitudinal sectional View of asomewhat similar type of boiler, and Fig. 8 a cross-section illustrating the construction of the same.

In Fig. l the coiled tube-A, which has longitudinal anges a, is lled with shot y, so that only finely divided or broken spaces eX- ist for the steam and Water.

Fig. 4 shows a tube A, having interior and exterior projecting arms or lugs a', for c onyfinelydivided" "material ductingthe heat into the interior of the tube, which is to be illed with shot, as in Fig. l.

I) is the fire-box. Water is supplied under pressure at the base of the boiler through pipe E and steam is taken out at top by pipeF.

A In Fig. 5 vertical tubular sections B--four being shoWn-are connected at top and bottom by manifolds B. Each section is composed of four quadrant lengths b, hanged at their edges, between which flanges plates b 6o are bolted, so as to project inside and outside of the tubular sections toconduct thehheat tof the interior. The sections are filled with y' to break up the space. Tater is supplied to lower manifold 65 by pipe E, and steam` is taken from upper manifold by pipe F. D being the iire-boX, the products of combustion pass up centrally l between the columns or sections, and also outside, as indicated, in contact with the sec- 7o tions and plates b'.

In Figs. 7 and 8 the water or steam space is annular in cross-section, its interior and exterior Walls being built up of curved flanged lengths C, between which heat -conducti'ng 75 plates C are bolted, so as to extend across the annular space and project from its interior and exterior Walls. Water is supplied at the base and steam is taken from the top. The productsof combustion pass up the central 8o liuc, and also outside, heating both sides or edges of the plates C. The annular chamber is filled with finely-divided material y.

In all these forms of boilers (which are exhibited as merely some of the ways in which 85 the invention may be embodied) the water and steam are squeezed or iinely divided, and are prevented from assuming spheroidal forms.. Consequently levels, gages, dac., are unnecessary,.and there is no possibility of dangerous 9o explosion, since the amount of steam and Water'in the boiler at any one time is exceedingly small. For the same reason steam forms immediately, and there is a marked economy inv fuel.V yThe mass of metal labsorbs the heat: 9 5 and is not .subject to rapid changes of temperature. y

The pipe-coil boilers may be made very light, and are specially adapted for use with small engines for running sewing-machines, Ioo

1. A steam-generator oE-the character de-l scribed, having an elongated or pipe section of relativelysmall cross-section in which the steam is generated, and metallic shot or other suitable finely-divided material illing the same, whereby the interior steam and water spaces'of the boiler are broken up and are of minute cross-sectional area, a water-supply pipe connected with one end of the elongated chamber, 'and a steam-exit pipe,connected with the opposite end, substantially as set forth.

2. In a steam-generator, the combination of the steam-generating chamber having heatconducting plates or projections extending outwardly into the combustion-chamber and inwardly into the boiler-space, and metallic shot or other suitable inely-divided material filling the boiler-space, substantially as set forth.

fire-place so arranged that the products of 3. In a steam-generator of the character described, the combination of the interior tube affording a central passage for the products of combustion, the exterior tube, and metallic shot or finely-divided material filling the annular space between them.

4. In a steam-generator of the character dev scribed, the combination of the interior and exterior tubes, metallic shot or finely-divided material lling the annular space between them, heat-conducting plates or projections extending inwardly from the interior tube and outwardly from the exterior tube, and a combustion pass inside and outside of the annular chamber.

'5. The combination of the interior and exterior tubes C C, formed of longitudinal sections, and the heatconducting plates C', bolted between the sections.

6. The combination of the interior and exterior sectional tubes, the heat -conducting plates secured between the sections thereof, and the filling of finely-divided material.

In testimony whereof I have hereunto sub- 5 5 scribed my name.

ETIENNE GILLET.

Witnesses:

*i J. F. BENZIENG, Si. SAVERRIERE. 

